Designed to fit sports, superbike, endurance and touring motorbikes using the cylindrical bore wall (steering head tube) of the fork stems. The 1" Ball fixing. Light weight - made from Aluminium. Attaches easily to the steering head tube of fork stems. Important: First check that your stem cover can be removed leaving a central hole for the mount to fix in - Simply drop the Fork Stem Motorcycle attachment into the hole of the stem and tighten. The split shaft will expand to fit the inside wall of the fork stem Use an Allen Key to tighten to create a tight fit.